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Goliathus

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Everything posted by Goliathus

  1. Congratulations - that's great news! I often find this species on tree stumps in my backyard, but have never attempted to breed it. I've occasionally come across the full-grown larvae, which are quite large and have a really vicious bite. Looking forward to hearing your progress with them!
  2. I found that they would readily accept pecan (Carya illinoinensis) leaves. They will probably also eat hickory (also in the genus Carya), and definitely walnut (Juglans).
  3. Based on my own experiences with breeding insects over the past 30 years, I am totally in agreement with this statement.
  4. Statistically, the chances that any female scarab you collect from the wild is already carrying fertilized eggs is quite high; in most cases, they will have found a mate before you found them. Same with saturniid moths.
  5. I've heard that the larvae of Chalcolepidius live in dead wood, where they prey on other beetle larvae, and possibly termites. Drawing of a Chalcolepidius larva - https://www.zin.ru/Animalia/Coleoptera/eng/tagch222.htm
  6. It seems that Quercus oblongifolia and Quercus emoryi are the two of the most common host plants of E. oslari. However, Liquidambar (sweetgum) is accepted by a rather wide variety of Saturniidae, including E. imperialis, so I felt it was worthwhile to try offering it to the oslari. Carya (pecan) is also accepted by imperialis, so that was worth trying as well, since that is another tree that I have very easy access to. Re your comment on humidity: interestingly, I have heard the opposite - that humidity is quite dangerous for most caterpillars, especially in the early instars. I'm keeping the newly hatched oslari in a moderately well-ventilated container, but have not added any additional moisture other than what evaporates out of the food plants.
  7. I've never heard of any records of M. pachecoi or D. hyllus straying into the US. To get technical: there are various Mexican insect species that, while they do not have wild breeding populations here in the US, do occasionally (though quite rarely) stray across the border as isolated individuals. Examples would be the swallowtail butterflies Papilio anchisiades and Papilio pilumnus. In the highly unlikely event that you were able to collect a pair of such butterflies on the US side of the border, or at least an already fertilized female that you could get to lay eggs, then yes - it would be legal to have and breed them since they were not brought across the border by human means - they came across on their own, independently, and therefore represent a naturally occurring situation.
  8. The larvae have apparently accepted at least one or more of the plants I offered, but it's a bit hard to tell which, as of yet. The sweetgum has definitely been chewed, and possibly the pecan too, but I suspect that they're mainly focusing on the oak. I should have a much better idea of their preference within another day or two. In any case, there's some tiny frass about the size of sand grains accumulating, so they're definitely eating.
  9. The eggs hatched this morning. Have offered the larvae Quercus, Liquidambar, and Carya; hopefully, they'll accept at least one of them. I cut the edges of the leaves, as I've heard that this can help prompt them to start eating.
  10. I received some eggs of Eacles oslari this past week - does anyone here have any advice on how best to rear them? The eggs are now rapidly darkening, and I expect them to hatch any day now. Apart from oak, other suggested food plants include Liquidambar and Prunus. I wonder if they might also accept Pecan (Carya), as this is known to be a host tree of the Eastern Imperial Moth (E. imperialis).
  11. True - the only dynastine scarabs that I've ever actually found on tree trunks (Mesquite) was Megasoma punctulatus. But, that's by no means the most reliable way to find this species - looking for them at lights is far more efficient.
  12. No - it doesn't range as far north as the US. I've only ever heard if it being found in the Mexican states of Sonora and Sinaloa.
  13. In isopods and reptiles they are called morphs. so forms are just variations? Morph, form, and variation are all essentially interchangeable terms. Also the Regius goliathus hybrid Bred by insect brothers would in theory create a new species? No - it's a hybrid, in the same way that a cross between a lion and tiger, or a horse and donkey, are also hybrids. Hybrids can be fertile or infertile, depending on genetics. Incidentally, it's still not yet been truly established whether Goliathus "atlas" is indeed a hybrid between regius and cacicus, or simply a rare form that occasionally turns up within the regius gene pool. There are at least two (or more) rare forms of regius that look quite similar to atlas, but are not the true atlas, which is distinguishable from the others by a particular detail of the dark band that runs along the inner elytral margins (elytral suture).
  14. Might be a typo? Could it mean Brac? - https://www.google.com/maps/place/Bra─Ź/@43.3239049,16.373684,10z/data=!4m5!3m4!1s0x134a9b3548954eaf:0x927404eda9b10653!8m2!3d43.3048913!4d16.6527099?hl=en
  15. Most of these are forms, rather than species. By the way, G. albosignatus albosignatus and G. orientalis undulatus have been left out. As for G. goliatus - in the words of entomologist Gilbert Lachaume (1983), some coleopterists have "amused themselves by naming a large number of varieties". I can't even recall all of the G. goliatus forms that I've seen listed on sites such as eBay over the years, many of which are not actually "officially recognized", and seem to have been coined by sellers. I believe that one such example, is hieroglyphicus -
  16. Moisture absorption. See coloration section of the following page - https://www.aquarimax.com/how-to-keep-blue-death-feigning-beetles-asbolus-verrucosus/
  17. Yes - flake soil is fine for rearing Cotinis, but when they're ready to build pupal cells, you'll need to make the substrate at least 50% fine sand. At least, that's been my experience. Unlike species such as Gymnetis, Cotinis seems unable to build proper cells from purely organic substrate.
  18. Why not just keep them in groups in a larger container? I used to keep them separately, but haven't done that in many years. I even found that I got much better growth when they're kept together. It might have something to do with a group being able to more effectively augment the substrate with their symbiotic bacteria, than a single larva can alone. Probably best not to keep any more than 12 larvae in something the size of a (50%) filled 10 gallon tank, though.
  19. Such as 64 oz? - https://m.media-amazon.com/images/I/81XOxr82ghL._AC_SL1500_.jpg
  20. The thing about grill pellets is that they're "food grade" - since they're intended for cooking rather than heating, they don't have the potential for any harmful impurities. Some varieties of fuel pellets might possibly be free of contaminants, but it's almost impossible to know. In any case, fuel pellets might also contain some percentage of coniferous wood such as pine.
  21. That's it? Just a tiny structural difference in one of the tarsal segments? By that logic, people with different hair and eye colors could be classified as different species!
  22. Those are fuel pellets, not grill pellets - that's why the price is so low. I wouldn't risk using them for making substrate.
  23. What was the reasoning behind giving Megasoma actaeon johannae (M. rex) species status? It seems to me, that rex is indeed a ssp. (or just a morphological variant) of actaeon.
  24. Arguably the "rarest" Megasoma, in respect to its rather limited distribution.
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